do you have reason to believe the older brother, tamerlan, was the leader in this and that dzhokhar may have been the follower? can you hear me, commissioner? we have lost the commissioner temporarily. while we try to re-establish that connection, we're going to continue our conversation, and with so many questions still unanswered, we'll come back to the commissioner when we can. so many questions still unanswered about the terror plot and how to protect our homeland, we've invited two congressional leaders on national security to discuss what happens now. dianne feinstein is chair of the senate intelligence committee, congressman pete king is chair of the house committee on counterterrorism, and he joins us live from new york. i'm sorry. i've got him in my ear. senator, congressman, hold on. we're going to go back to the police commissioner. do you have a sense whether the older brother tamerlan was the leader in this, and dzhokhar somehow followed him into the conspiracy? >> any information along those lines is based upon conjecture at this point in time. i don't know definitively wh